User`s manual

82
Other Functions Chapter 6-7
6-7-5 Frequency Jump Function (n49 to n51)
• The frequency jump function prevents the Inverter from generating
frequencies that make the mechanical system resonate.
• The frequency jump function can be used effectively to set two dead
bands of a frequency reference.
Note Values will be set in 0.1-Hz increments if the frequency is less than 100 Hz
and 1-Hz increments if the frequency is 100 Hz or greater.
Set Values • Set n49 and n50 for jump frequencies 1 and 2 to the central values of
jumping frequencies.
• These values must satisfy the following condition.
n49 ≥ n50
• The value in n51 must be set for the jump width.
• This function is disabled with n51 set to 0.0.
• The operation of the Inverter within the dead bands is prohibited. While
the Inverter is in acceleration or deceleration control, however, the
Inverter does not jump the bands but changes the frequency smoothly.
n49 Jump Frequency 1 Changes during
operation
No
Setting
range
0.0 to 400 (Hz) Unit of
setting
0.1 Hz
(see note)
Default setting 0.0
n50 Jump Frequency 2 Changes during
operation
No
Setting
range
0.0 to 400 (Hz) Unit of
setting
0.1 Hz
(see note)
Unit of setting 0.0
n51 Jump Width Changes during
operation
No
Setting
range
0.0 to 25.5 (Hz) Unit of
setting
0.1 Hz Default setting 0.0
Frequency Jump Function
Output
frequency
Reference frequency
n49 ≥ n50
n51
n50 n49